I have received this error too. I have checked all my original disks and that file is not distributed with XP. I did notice that Nlite 1.3 does have nhelper.ex_ in its directory. C:\Program Files\nLite>dir Volume in drive C has no label. Volume Serial Number is F829-0446 Directory of C:\Program Files\nLite 12/31/2006 21:17 <DIR> . 12/31/2006 21:17 <DIR> .. 09/17/2006 21:34 119,296 7z.exe 01/05/2004 20:47 2,048 boot.bin 12/31/2006 21:17 <DIR> Lang 08/19/2006 15:08 1,533 license.txt 12/19/2006 22:02 188,416 mcdbnet2.dll 12/19/2006 22:02 74,240 ncab.dll 12/17/2006 16:33 40,231 nhelper.ex_ <------here 12/19/2006 22:02 831,488 nLite.exe 12/31/2006 21:17 48 nlite.url 12/31/2006 21:17 <DIR> Presets 12/31/2006 21:17 5,275 unins000.dat 12/31/2006 21:17 678,682 unins000.exe 10 File(s) 1,941,257 bytes 4 Dir(s) 75,442,724,864 bytes free C:\Program Files\nLite> dude